Sleep is an active process in the human body that restores the mind and relieves fatigue. Adequate sleep, a balanced diet and proper exercise are the three health standards recognized by the international community. In order to arouse the awareness of all people on the importance of sleep, the Global Sleep and Health Program sponsored by the International Foundation for Mental Health and Neuroscience launched a global campaign in 2001, which focused on drawing people’s attention to the importance of sleep and the quality of sleep, and in 2003, the China Sleep Research Society officially introduced the “World Sleep Day” into China. “In 2003, World Sleep Day was officially introduced to China by the China Sleep Research Association. Healthy sleep Rule 1: sleep time Four seasons of sleep spring and summer should “sleep late and get up early”, fall should “sleep early and get up early”, winter should “sleep early and get up late”. It is best to get up before sunrise, not too late. Normal people generally sleep about 8 hours a day, the frail and sick should be appropriate to increase the sleep time. Law 2: sleep direction Sleeping head north foot south. The human body is affected by the earth’s magnetic field at any time and any place, and the brain is also affected by the magnetic field interference in the process of sleep. When people sleep to take the head north foot south posture, so that the magnetic lines of force smoothly through the human body, to minimize the interference of the earth’s magnetic field. Law 3: Sleeping posture Sleeping like a bow has a good effect, lying to the right side of the burden is light. Studies have shown that “sleep like a bow” can be just right to reduce the force of the earth’s core on the human body. Since the human heart is mostly on the left side of the body, lying on the right side can reduce the pressure on the heart, while avoiding hands near the heart, to avoid waking up because of nightmares. Law 4: sleep time period Whether it is “night owl type” people or “early to bed and late to rise type” of people, should find their own biological clock, improve the efficiency of sleep and rest. Traditional Chinese medicine theory that the son (11:00 at night to 1:00 a.m.), noon (11:00 to 13:00 during the day) two hours a day, the temperature difference between the time of the greatest change, this period of time the human body needs to rest properly. Law 5: sleep environment in the bedroom should try to avoid placing too many electrical appliances to ensure that the human brain rest without too much interference. In addition, do not wear “watch”, “teeth” and cell phones and other items to sleep, otherwise it will affect the health of the body.